Cooling system



E. O. SCHJOLIN COOLING SYSTEM oct. 6, 1931.

Filed June 4, 1928 1 lll/A,

Patented Oct. 6, 1931 ERIC OLLE SCHJOLIN, OF BIRMINGHAM, MICHIGAN, ASSIGNOR T YELLOW TRUCK &

respectively,

COACH MANUFACTURING'COMPANY, OF PONTIAC, MICHIGAN, A CORPORATION OF MAINE Application med June 4,

,'This'invention relatesto a cooling system for internal combustionengines.

It is an object of this invention to provide acooling system for internal combustion engines which will insure parts of the engine.` i

It is a further object of this invention to provide in combination with the' coolingsystem of an internal combustion engine means whereby a portion of the cooling medium, after having` become `heated in cooling the `proper cooling of all engine, is caused to give up a portion of its In the drawing, the single figure shows a cross section through one of the cylinders of an internal combustion engine in which 1s embodied my invention.

Referring to the drawing, they reference character 10 indicates an yengine of the double sleeve valve type which includes a crankcase 11 to which is secured the cylinder block 12'. Within the cylinder block are provided a plurality of cylinders in each of which are provided reciprocating outer and inner sleeve valves 13 and ltanda reciprocating piston 15. At spaced points in the walls of the cylinder, there' are provided intake and discharge ports 16 and 17 which communicate, with the intake manifold 18 and the lexhaust manifold (not shown). outer and inner sleeve valves are* provided at 19 and 20, respectively, withvintake ports adapted toregister witheach other and with the'intake port in the cylinder wall at the propervm'oment to admita vcharge of combustible mixture intothe cylinder, and` at 21 and'22, respectively/,with exhaust ports adapted to register with 'each other and with the exhaust portin the ecylinder wall at the proper moment `to allowthe discharge of exhaust gases from the cylinder.

The' upper ends'of the cylinders are closed by ahead 23 which includes a hollow cylin- COOLING SYSTEM.'

1928. Serial No. 282,681.

provided centrally thereof with a by an upwardly wall 27 with its threaded portion in engagement with the threaded ing'therethrough into the cylinder.

The cylinders are water-jacketed, as indicated at 29, to providel passages, such as 30,

bore 26 and extendthrough'which cooling water may be circulatedv around the cylinders.

The head 23 is enclosed by a cover 31, which is spaced therefrom to provide a passage 32, which is in communication with the passages V30 in the block through passages not shown) Y and which is also in communication with the annular cooling water spaces 33 provided in the downwardly projecting portions of the cylinder head.

The reference character 34.- indicates a .f

water p ump, which is adapted to be driven in any suitable manner from the engine, and which is provided with an intake conduit 35 through which it is adapted to withdraw water from the bottom of a radiator of the type ordinarily used on automobiles. The pump is also provided with a discharge conduit36 whichl communicates with the connection 37 which opens into the cylinder block water jacket and through which the pump is adapted to discharge water from the radiator into the cylinder block Water jacket, whence it passes into the cylinder head water jacket, whence it passes, through a suitable connection 38, into the top of the radiator. There is provided in the connection 38 a butterfly valve 39' which may be operated in any suitable lmanner to control Vthe ilow of water therethrough.

It is well known that the portions of the cylinder head above the piston-ie. the de municates with a pipe 43k whichfopens into a so'as vto allow the-passage of waterthrough duits 36 'and 37y into the vpassages f3()V around i I; the conduit 44 directly backinto 'the pump Y other I part @provide for a vproper ycirculation of water j through these depending portions, To insure f proper "circulation ofwater through thefdepending portions of cylinderhead andrat the same time to provide for heating the combustiblemixture supplied tothe cylinders of "-the'iegineprior to its introduction into the cylinders, I provide a jacket 40 around the intake manifold 18, and pipes 41,'each'of Ving portions 24 ofthe V.of which communicate,

4return `tothe' pump through the pipes 41" which opens at one 'end -f through the 3 5 of one ofthe annular spaces 33inthedependi through passages 42 in the cylinder block, with the. interior 'of the Vjacket40 around the :intake manifold. i* The jacket aroundthe intake manifold also comsecondintake conduit pump34.V y l The above Adescribed structure'operatesas follows (assuming that the valve 39 is open 44 provided on the the connection 38): When the engineV is Yturned over, the pump 34 starts operating and draws water fromfthe radiator through the conduit 35 and forces it through'the conthe cylinder block, thereby cooling the-block.' From 4the passages 30 the water passes,

hereinbeforementioned openings, into-p the passage 32 andthe spaces 33,

whence part of it passes,.through the 'connec-.

tionv 38 back into the radiator, whence, after `being cooled, it is redrawnandrecirculated by the-pump.' Y As :will be clear, the suction of thepump oni-the intake ,conduitf44'will' f cause a portion of the Water which flows into ,the spaces'33, and, therefore, attainsY a maximum temperature, to be withdrawn therefrom, through the pipes 41, the passage 42, theintake manifold jacket 40, the pipe 43 and where itwill be mixed with the cooler water from the radiator and refirculated therewith. It will be obvious .that the'withdrawal-of a portion of the heated cooling Water and its and associatedpassages accomplishes adouble function. Firstly. it insuresa 'positiveV circulation of water through the depending portions of the. cylinder head ,wherebyv they are efficiently cooled, and secondlyit pro-- videsfor the use of a portion of the heat absorbed by-this'water in the course of "its circulationthrough the engine to :heat the yincoming'combustible mixture thereby aiding in vaporizing it., It is YObvious that, if de- Y Swed" a bra-Pass may be provided, Wherebys at will, the cooling medium withdrawn from ythe lrecessesginl the cylinder head throughthe ,pipes 41, maybe returned to the pump Withadjagcent the bottomcylinder head andY all outipassingV throughthe' intake manifold jacket.

f It willbe obvious that the valve'39 can be i'fold jacket l4Oan'd the pipe-437therebypreventing, to a great extent, the loss fo'f any of the heat generated by the engine, and using a partV of .it to heat the incoming combustible fmixturejthereby Vaiding VKmaterially in starting the engine in coldweather. If the valve 39 is opened,` a part ofthe cooling water will lflow through the radiator andk a" part through .the intake manifold jacket and I associated passages, the proportion flowing Athrough each depending upon several factors, including, as is obvious, theextent' towhi'ch the .valve is opened.l n Y Though I have shown .and described a speciicV embodiment of my invention, it is to be understood that this has lbeen Vdone .merely by way of example, and not with'the obj ect. of limiting my inventionthereto, and

that the scope of my inventionis defined only by the appended claims. l f Iclaim: .l "a f 1..-In an internal vcombustionengine having-a cylinder and a cylinder head having therein a recess adapted to receive a cooling medium, means to conduct a-cooling' medium into the recess, and means extending into the recess andlthrough which a portion of the vcooling'medium is adapted topbe removed therefrom. v l v 2.'Inan internal combustion engine hav- .ing a cylinder and a cylinder head dependinggiintothe cylinder and having therein a [recess adapted to contain a cooling medium, m'eans to conduct a cooling medium into the recess. and vmeans extending into the recess and through which a portionof the cooling medium is adapted to beremoved from the recess.'` y n a',

' 3. The invention claimed in claim 2, and a cooling medium withdrawn from the recess through 'the second mentioned ymeans around the intake conduit.

4. In" aninternal combustion engine having a Vcylinder and a cylinder'head having a portionfdepending into the cylinder and havingv therein a recess, an intake manifold, a jacket around a portion of the intake mani- ;fold, means to conduct-a cooling medium into f the recess, means extending intoy the recess l and through .which a .portion of the cooling medium is adapted to' be withdrawn-from the recess and conducted tothe jacket, means adapted to conduct Vcooling' medium fromv the recess to a cooling means," and means adapted to Withdraw cooling medium fromy the cooling means and the jacket and return it to the cooling means and the jacket, Y 5. The invention claimed in claim 4 and 5 means to regulate the flow of cooling medium through the cooling means.

6. In an internal combustion engine, a passage through Which a cooling medium is adapted to be circulatedto Withdraw heat from the engine, a passage through Which a cooling medium is adapted to be conducted from the first-mentioned passage to a device in Which heat is adapted to he eXtra cted therefrom, a fuel intake passage, a passage adjacent the fuel intake passage, a passage through Which cooling medium is adapted to be conducted from the first-mentioned passage to the fourth-mentioned passage so that it gives up a portion of its heat to the fuel intake passage, means for circulating cooling medium through said passages and device, and means for regulating the volume of the cooling medium Which is conducted to said device and the fourth-mentioned passage.

7. In an internal combustion engine, a cylinder block Water jacket, Aa cylinder head Water jacket, a heating element, a passage for conducting cooling medium to the cylinder block Water jacket and the cylinder head Y Water jacket, and a passage for conducting heated cooling medium from the cylinder head Water acket to the heating element.

. 8. In an internal combustion engine, a cylinder block Water jacket, a cylinder head Water jacket, a fuel intake passage, a passage adjacent the fuel intake passage, :neans to circulate cooling ymedium through the cylinder block Water jacket and the cylinder head Water jacket and from the cylinder head Water jacket through thesecond-mentioned passage and from the second-mentioned passage back to said circulating means.

9. In an internal combustion engine a cylinder block Water jacket, a cylinder head Water jacket, a heating element, means to circulate cooling medium through the cylinder block Water jacket and the cylinder head Water jacket, from the cylinder head Water jacket through the heating element, and from the heating element hack to said circulating means, and a passage for conducting cooling medium from one of said Water jackets through means yin which heat is adapted to y be extracted from the cooling medium and back to said circulating means.

In testimony whereof I aiiX my signature.

ERIC OLLE SCI-IJOLIN. 

